Article
Only by installing a more intelligent controller-type resistance welding machineButt welding machineThere are constant current control, constant voltage control and constant heat control. Xinxing's pneumatic spot welders, pneumatic butt welders, pneumatic projection welders, pneumatic seam welders and automatic welders all have this function.
1. Constant current control Constant current compensation refers to a quality monitoring technology that maintains a constant effective value of the welding current during the welding process to ensure that the heat generated in the welding zone remains basically unchanged, thereby obtaining a stable nugget size. Constant current control is mainly to keep the welding circuit current constant, so it is suitable for situations where parameters such as power supply voltage, ferromagnetic object penetration, and thickness of the welded plate are variable. However, it is impossible to control the decrease in solder joint current density caused by current shunting and electrode wear, which affects the welding quality.
1) Primary constant current The current transformer is installed in the primary main circuit of the welding transformer. The controller detects the primary current value of the transformer through the current transformer and compares it with the set value. After internal calculation, it outputs a trigger pulse signal to automatically adjust the conduction angle of the thyristor to keep the primary current of the transformer constant, thereby achieving the purpose of constant welding current.
2) Secondary constant current The sampled induction coil is installed in the secondary circuit of the welding transformer. The controller detects the secondary current value of the transformer through the induction coil and compares it with the set value. After internal calculation, it outputs a trigger pulse signal to automatically adjust the conduction angle of the thyristor. By adjusting the primary current of the transformer, the secondary welding current of the transformer is kept constant.
2. Constant voltage control The grid voltage is sampled at each cycle of power supply and compared with the standard voltage in the circuit. The guide angle of the thyristor is adjusted based on the comparison results to keep the output voltage constant. This method is suitable for situations where the power supply voltage is variable.
3. Constant heat control The current setting value is a thousandth of the total power of the welding transformer. The controller calculates the required conduction angle based on the set value and sends a trigger signal. When the grid voltage fluctuates, the controller automatically adjusts the conduction angle of the thyristor to fine-tune the current output power to keep the current output power constant.
Wuxi Xinxing Welding Equipment Factory has been engaged in resistance welding machines for 29 years. Its core technical products include: semi-automatic butt welding machine, pneumatic-flash butt welding machine, multi-strand wire welding machine, foot spot welding machine, pneumatic spot welding machine, medium frequency spot welding machine, row welding machine mesh welding machine, resistance automatic Welding machine, energy storage welding machine, copper rod and aluminum rod disc circular welding machine, auto parts spot welding machine, sheet metal spot welding machine, home appliance hardware spot welding machine, small electrical appliance spot welding machine, copper row copper pipe welding machine, nut spot welding machine, stainless steel welding machine, foil strip spot welding machine, aluminum spot welding machine, multi-head spot welding machine,Bag cage spot welding machine, mesh welding machines, ton rack welding production lines, resistance automatic welding machines, brazing machines, diffusion welding machines, projection welding machines, seam welding machines, wire and cable optical cable supporting equipment, etc., reaching more than 300 types. If you are interested in our welding equipment, please contact us.